Journal
FUEL
Volume 285, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2020.119105
Keywords
Sewage sludge; Pretreatment techniques; Anaerobic digestion; Biogas production
Categories
Funding
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) of the Republic of Korea [20194110300040, 20183020141270]
- Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [20194110300040, 20183020141270]
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Anaerobic digestion (AD) of sewage sludge is an efficient remediation technique, but the presence of complex floc structures and high organic matter content hinder hydrolysis. Pretreatment techniques such as mechanical, chemical, thermal, and biological processes can accelerate hydrolysis and improve AD efficiency.
Anaerobic digestion (AD) of sewage sludge is one of the most efficient, effective, and environmentally sustainable remediation techniques; however, the presence of complex floc structures, hard cell walls, and large amounts of molecular organic matter in the sludge hinder AD hydrolysis. Consequently, sewage sludge pretreatment is a prerequisite to accelerate hydrolysis and improve AD efficiency. This review focuses on pretreatment techniques for improving sewage sludge AD, which include mechanical, chemical, thermal, and biological processes. The various pretreatment process effects are discussed in terms of advantages and disadvantages, including their effectiveness, and recent achievements are reviewed for improved biogas production.
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